great, good information coming in :-)
I will make a new nightly this week, switching back to posix.
Why winlibs, well the previous releases/nightlies were using :
https://sourceforge.net/projects/mingw-w64/files/. ===> Which seems dead.
For some years I wanted to switch back to TDM (gcc 10), but problems were reported in the forum, so I never tried.
So I did some minimal googling and ended up at winlibs, and gave it a try, and it seems to work ok. No build issues at all, in the process.
Looking at it again :
https://www.mingw-w64.org/downloads/#mingw-buildsWinlibs is indeed the second entry, and the ones you mention is actually the first entry.
I don't remember, I think I might have come across these 2, my experiments are like over 1 month old, and the fact winlibs had gcc13 most probably influenced my selection.
To be honest, I don't know the differences between the 2 sets. I would suggest that as winlibs has some explanation on that page , that would also be welcome for your set.
And I think already in the past a google search also already had shown me winlibs, since on a test machine it was on the bookmarks toolbar of firefox ;-)